//
//  ComposeViewController.swift
//  Weibo10
//
//  Created by male on 15/10/24.
//  Copyright © 2015年 itheima. All rights reserved.
//

import UIKit
import SVProgressHUD
// MARK: - 撰写控制器
class ComposeViewController: UIViewController {
    /// 照片控制器
    private lazy var picturePickerController = PicturePickerController()
    /// 表情键盘视图
    private lazy var emoticonView: EmoticonView = EmoticonView { [weak self] (emoticon) -> () in
        
        self?.textView.insertEmoticon(emoticon)
    }

    // MARK: - 监听方法
    //关闭
    @objc private func close() {
        // 关闭键盘
        textView.resignFirstResponder()

        dismissViewControllerAnimated(true, completion: nil)
    }
    //发布微博
    @objc private func sendStatus() {
//        print("发布微博")
        //1.获取文本内容
        let text = textView.emoticonText
        //2.发布微博
//        NetworkTools.sharedTools.sendStatus(text) { (result, error) -> () in
//        let image = UIImage(named: "123")
        let image = picturePickerController.pictures.first
        NetworkTools.sharedTools.sendStatus(text, image: image) { (result, error) -> () in

            if error != nil {
                print("出错了")
                SVProgressHUD.showInfoWithStatus("网络不给力")
                return
            }
            print(result)
            //关闭控制器
            self.close()
        }
    }
    /// 选择照片
    @objc private func selectPicture() {
        print("选择照片\(picturePickerController.view.frame)")
        //推掉剪片
        textView.resignFirstResponder()
        //0.如果已经跟新了约束不在执行后续代码
        if picturePickerController.view.frame.height > 0 {
            return
        }
        
        //1.修改照片选择控制器的约束
        picturePickerController.view.snp_updateConstraints { (make) -> Void in
            make.height.equalTo(view.bounds.height * 0.6)
        }
        //2.修改文本视图的约束  重建约束 把之前textview的约束全部删除
        textView.snp_remakeConstraints { (make) -> Void in
            make.top.equalTo(self.snp_topLayoutGuideBottom)
            make.left.equalTo(view.snp_left)
            make.right.equalTo(view.snp_right)
            make.bottom.equalTo(picturePickerController.view.snp_top)
        }
        //3.动画更新约束
        UIView.animateWithDuration(0.5) { () -> Void in
            self.view.layoutIfNeeded()
        }
    }
    /// 选择表情按钮
    @objc private func selectEmoticon() {
        //如果使用的是系统键盘 nil
        print("选择表情\(textView.inputView)")
        //1.退掉键盘
        textView.resignFirstResponder()
        //2.设置键盘
        textView.inputView = textView.inputView == nil ? emoticonView : nil
        //3.重新激活键盘
        textView.becomeFirstResponder()
        
    }
    // MARK: - 键盘处理
    /// 键盘变化处理
    @objc private func keyboardChanged(n: NSNotification) {
        print(n)
        
        // 1. 获取目标的 rect - 字典中的`结构体`是 NSValue
        let rect = (n.userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()
        // 获取目标的动画时长 - 字典中的数值是 NSNumber
        let duration = (n.userInfo![UIKeyboardAnimationDurationUserInfoKey] as! NSNumber).doubleValue
        //动画曲线数值
        let curve = (n.userInfo![UIKeyboardAnimationCurveUserInfoKey] as! NSNumber).integerValue
        
        let offset = -UIScreen.mainScreen().bounds.height + rect.origin.y
        
        // 2. 更新约束
        toolbar.snp_updateConstraints { (make) -> Void in
            make.bottom.equalTo(view.snp_bottom).offset(offset)
        }
        
        // 3. 动画
        UIView.animateWithDuration(duration) { () -> Void in
            //设置动画曲线
            //曲线     UIKeyboardAnimationCurveUserInfoKey = 7;
            //如果之前的动画没有完成,又启动了其他的动画 让动画的涂层直接运动到后续动画的目标位置
            //一旦设置了 7 动画时长无效 ,动画时长统一编程0.5s
            UIView.setAnimationCurve(UIViewAnimationCurve(rawValue: curve)!)
            self.view.layoutIfNeeded()
        }
        //调试动画时长 - keypath 将动画添加到图层
        let anim = toolbar.layer.animationForKey("position")
        print("动画时长\(anim?.duration)")
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 添加键盘通知
        NSNotificationCenter.defaultCenter().addObserver(self,
            selector: "keyboardChanged:",
            name: UIKeyboardWillChangeFrameNotification,
            object: nil)
    }
    
    deinit {
        // 注销通知
        NSNotificationCenter.defaultCenter().removeObserver(self)
    }

    //MARK: - 视图生命周期
    override func loadView() {
        view = UIView()
        setupUI()
    }
    
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        // 激活键盘 若果已经存在照片控制器视图 就不在激活键盘

        if picturePickerController.view.frame.height == 0{
            textView.becomeFirstResponder()
            
        }
    }

    //MARK: - 懒加载控件
    //工具条
    private lazy var toolbar = UIToolbar()
    /// 文本视图
    private lazy var textView: UITextView = {
        let tv = UITextView()
        tv.font = UIFont.systemFontOfSize(18)
        tv.textColor = UIColor.darkGrayColor()
        //始终允许垂直滚动
        tv.alwaysBounceVertical = true
        // 拖拽关闭键盘
        tv.keyboardDismissMode = UIScrollViewKeyboardDismissMode.OnDrag
        // 设置文本视图的代理
        tv.delegate = self

        return tv
    }()
    ///占位标签
    private lazy var placeHolderLabel: UILabel = UILabel(title: "分享新鲜事...", fontSize: 18, color: UIColor.lightGrayColor())
    
}
// MARK: - UITextViewDelegate
extension ComposeViewController: UITextViewDelegate {
    func textViewDidChange(textView: UITextView) {
        navigationItem.rightBarButtonItem?.enabled = textView.hasText()
        placeHolderLabel.hidden = textView.hasText()
    }
}
//MARK: - 设置界面
private extension ComposeViewController {
    func setupUI() {
        // 0.取消自动调整滚动视图间距 ios7开始有的
        automaticallyAdjustsScrollViewInsets = false
        //1.设置背景颜色
        view.backgroundColor = UIColor.whiteColor()
        //2.设置控件
        prepareNavigationBar()
        //工具条
        prepareToolbar()
        //文本视图
        prepareTextView()
        preparePicturePicker()
   
    }
    ///准备照片选择控制器
    private func preparePicturePicker() {
        //1.添加子控制器
        addChildViewController(picturePickerController)
        //2.添加视图
//        view.addSubview(picturePickerController.view)
        view.insertSubview(picturePickerController.view, belowSubview: toolbar)
        //3.自动布局
        picturePickerController.view.snp_makeConstraints { (make) -> Void in
            make.bottom.equalTo(view.snp_bottom)
            make.left.equalTo(view.snp_left)
            make.right.equalTo(view.snp_right)
            make.height.equalTo(0)
        }
        
    }
    /// 准备文本视图
    private func prepareTextView() {
        view.addSubview(textView)
        //自动布局
        textView.snp_makeConstraints { (make) -> Void in
            make.top.equalTo(self.snp_topLayoutGuideBottom)
            make.left.equalTo(view.snp_left)
            make.right.equalTo(view.snp_right)
            make.bottom.equalTo(toolbar.snp_top)
        }
//        textView.text = "分享新鲜事... "
        //添加展位标签
        textView.addSubview(placeHolderLabel)
        placeHolderLabel.snp_makeConstraints { (make) -> Void in
            make.top.equalTo(textView.snp_top).offset(8)
            make.left.equalTo(textView.snp_left).offset(5)
        }
    }
    /// 准备工具条
    private func prepareToolbar() {
        // 添加控件
        view.addSubview(toolbar)
        //设置背景颜色
        toolbar.backgroundColor = UIColor(white: 0.8, alpha: 1)
        //自动布局
        toolbar.snp_makeConstraints { (make) -> Void in
            make.bottom.equalTo(view.snp_bottom)
            make.left.equalTo(view.snp_left)
            make.right.equalTo(view.snp_right)
            make.height.equalTo(44)
        }
        // 3. 添加按钮
        let itemSettings = [["imageName": "compose_toolbar_picture","actionName": "selectPicture"],
            ["imageName": "compose_mentionbutton_background"],
            ["imageName": "compose_trendbutton_background"],
            ["imageName": "compose_emoticonbutton_background", "actionName": "selectEmoticon"],
            ["imageName": "compose_addbutton_background"]]
        var items = [UIBarButtonItem]()
        
        for dict in itemSettings {
            items.append( UIBarButtonItem(imageName: dict["imageName"]!, target: self, actionName: dict["actionName"]))
            
//            items.append(item)
            
            items.append(UIBarButtonItem(barButtonSystemItem: .FlexibleSpace, target: nil, action: nil))
            
        }
        items.removeLast()
        //一旦赋值,相当于做了一次copy
        toolbar.items = items
    }
    ///设置导航栏
    private func prepareNavigationBar() {
        //1.取消
        navigationItem.leftBarButtonItem = UIBarButtonItem(title: "取消", style: .Plain, target: self, action: "close")
        //发布
        navigationItem.rightBarButtonItem = UIBarButtonItem(title: "发布", style: .Plain, target: self, action: "sendStatus")
        // 禁用发布微博按钮
        navigationItem.rightBarButtonItem?.enabled = false
    //标题视图
        let titleView = UIView(frame: CGRect(x: 0, y: 0, width: 200, height: 36))
        navigationItem.titleView = titleView
        //添加子控件
        let titleLabel = UILabel(title: "发微博", fontSize: 15, color: UIColor.darkGrayColor())
        let nameLabel = UILabel(title: UserAccountViewModel.sharedUserAccount.account?.screen_name ?? "", fontSize: 13, color: UIColor.lightGrayColor())
        titleView.addSubview(titleLabel)
        titleLabel.addSubview(nameLabel)
        titleLabel.snp_makeConstraints { (make) -> Void in
            make.centerX.equalTo(titleView.snp_centerX)
            make.top.equalTo(titleView.snp_top)
        }
        nameLabel.snp_makeConstraints { (make) -> Void in
            make.centerX.equalTo(titleView.snp_centerX)
            make.bottom.equalTo(titleView.snp_bottom)
        }
    }
}
